Raimey,
One thing empirical data does not give you until too late is a good estimate of chamber pressure. The "stringing" of the shots on the syrup can is typical of "stringing" caused by the rifle barrel heating up while the shot barrel does not. If you are shooting for a group, you only need to wait longer between shots. If you are hunting, the animal will be dead or gone before the barrel heats up anyway, so it won't be a problem.
Mike